Apparatus for producing rapid electric oscillations.



E. VON, LEBEL. APPARATUS FOR PRODUGING RAPID ELECTRIC OSGILLATIONS.

APPLI OATION FIL'BD AUG. 4, 190a.

lfiki 1 IL Ti; Patented Nov. 5, 191g.

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ll Em 1/ nennm: voni LEPEL, 0F BERLIN, GERMANY.

APPARATUS FOR PRODUCING RAPIF ELECTRIC OSCILIJA'JIIONS".

, Specification of Letters Patent.

Patented Nov. 5, 1912.

Application filed A'u ust 4, 1908. Serial in. 446,959. I

To all whom it may concern: I

Be it known that LEGBE T voN Lnrnn, engineer, a subject of the 'King of Prussia, German Empire, residing at 9 Traunsteinerstrasse, Berlin Germany, have invented certain new and useful Improvements in Apparatus for ProducingRapid Electric Oscillations. I I

Numerous apparatus are known by means of whichan alternating current of a high period of vibration is produced by a direct current in such a .man er that an oscillatory circuit is excited a d electric are or by a similar process of discharge. I, But hitherto, there haslbeen known no producerof oscillations which consists of metal electrodes and is able to produce a power of more than i 100 watts with Wave lengths of 1000 meters and below as they are used in wireless telegraphy, without employing an air-blast or the like.

In the accompanying drawings: Figure 1 is a side view of a pair of electrodesembodying my invention; Fig. 2 a longitudinal section through a modified form of the electrodes, and. Figs 3-6 are ,wiring diagrams illustratingvarious combinations in which the electrode may be used;

, With my improved electrodes tance apart is to be taken very small as compared with their active surface, and is to be equal at all points of same. Therefore, the

electrodes are appropriately" formed by two disks A and B (Fig. 1), or by two cones A and B (Fig. 2), one being in the other,or by two concentric spherical surfaces, or other suitable arrangement of'bpposing surfaces. The electrodes may consist of steel, copper, brass and other metals, the positive electrode also of carbon. The space between the electrodes may be filled with air. Filling this space with othergases or liquid insulators has not been 'found particularly .=sffi cacious.' In case of small powers, it is necessary tocool the electrodes. The Form of discharge seems to be between the electric arc and the electric-spark. The'distance between the electrodes may be taken so small as to bebroken down at the Working voltage, so that the generator startsup without bringing the electrodes into contact with each others This is still possible at a voltage of 220 volts, the distance of the/elec ztmdes being then equal to fractions oi one 553 millimeter.

Therefore,

telegraphing according to the invention is operated 'in the heir and H is the auxiliary circuit.

same manner as ordinary tclegraphy that this purpose, a strip C (Fig. 1) or a pair of strips G, D (Fig. 2) of i terial, particularly paper, is brought bean insulating 'matween the electrodes in such a manner that it limits a parallel part of the surface of the electrodes, and projects out of-the edges of the electrodes, said strip or strips being gradually-used up. i I

.It has been found, that the output drawn from the oscillatory circuit becomes greater and can be easily brought up to one kilowatt, or more, if a second oscillatory circuit (auxiliary circuit) is connected in parallel, no powerbeingdrawn from the latter one. The natural vibration of the latter circuit may be equal'to' that of the working circuit or a harmonic of sama-or it may have any 'other relation, It is however advantageous to have the electric magnitude of. the auxili'ary circuit a multiple "of that of the work ing circuit, the resulting period of thevibrav tion depending on the electric constants of both circuits. In Fig. 3, E is the source of oscillations, K is the working circuit from For the same reason, the I which oscillatory power is drawn by cou-g pling it with an aerial wire the aerial wire itself forms the working c'ircuit'. According to the connection repreformer serving for coupling, the manner of acting being different according to the directi'omof winding of the transformer coils.

What I claim and desire to secure by Letters Patent of the United States is I l. The combination of spark gap elements and means to limit the activeiareas of spark I discharg n the same or antenna.F,-- In Fig. 4 i

i 2. Apparatus f r picihlucin'g continuous or nearly continuous oscillations from'flirct' or alternating current, comprising e pair, of metal electrodes the actingsurfaces of which are parallel to one another, and' an.

insulator between the edges of the [elecitrodes, constituting means to determine a separation -of the electrodes such that "ignition takes place 'without a preceding contact of the same. v l t 3. Apparetusfor producingscontinuous or nearly continuous electric oscillations iron;

direct or alternating current, comprising'in 'combinationspa-rk gap element's, means to limit the active areas of discharge on the Apparatus for producing continuous of ne ei Iy continuous electric oscill zition's from direct or elternating'current comprising n conilliliiitioIi e pair of metal 'elec'trodesthe. I .acting-surfacesof which afre'paf allel. to one molar; 'and meens toy-space these surfaces so that ignition takes'place without a Iprecedingcoritact oi'the'.flectrodes, and to spartlimit the" active:erees' of discharge on the said electrodes, and;ta workin circuitg-and an auxiliary icircuiteonnected iii-shunt with said electrodes, theyipvoi king, circuit being coupled inductivelywith the auxiliary 'c1rcuit.

Signeiby me' Be lin, Germany this 21st day 'of 'July 1908;

" Witnesses HENRY HAsPER," AR rH R Sounogpniz.

- GBERT IWRLI' .1LEPEL. 

